PT-2026-30992 · Mediawiki · Cargo Extension+1

Somerandomdeveloper + 1 · Published 2026-04-07 · Updated 2026-04-08 · CVE-2026-39839

Positive Technologies (AI Summary)

CVSS v4.0

6.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

Name of the Vulnerable Software and Affected Versions Mediawiki - Cargo Extension versions prior to 3.8.7

Description A stored cross-site scripting (XSS) issue exists in the Mediawiki - Cargo Extension due to improper neutralization of script-related HTML tags. This allows for the execution of malicious scripts within the context of a user's browser.

Recommendations Update Mediawiki - Cargo Extension to version 3.8.7 or later.

Fix

XSS

Weakness Enumeration

CWE-80

Related Identifiers

CVE-2026-39839

Affected Products

Cargo Extension

Mediawiki

References · 5

• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237977 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-39839 · Security Note
• https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Cargo/+/1237957 · Patch
• https://phabricator.wikimedia.org/T416271 · Vendor Advisory
• https://twitter.com/CVEnew/status/2041711904926904643 · Twitter Post